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ARCO#0595 N iii% - Page 1 of 2 Path to Closure Plan Go ARCO.0695(706077003191-MepTHIS S -roma Kc a ..-I ,ale[ Fey I I.s=ew-b 114fi41d 6100 HWY 99 N FRONTAGE ROAD OPEN-SITE ASSESSNE,,, STOCKTON,CA 95212 ACTIVITIE,5 REPORT r Au P 2 H SAN JOAQUIN COUNTY LOP AN JOAQUIN COUNTY (LEAD)-CASE N'0]OT PUBLIC BPA CASENORKER:ANGELICA SANMVAL -SUPERMSOR:ADRIENNE ELLSAESSER IOM&ERINTARI[CASE SUMIA&RyFOR T11IS SIM CENTRAL VALLEY R)AOCB(REGION 11)-CA1E£390011 CASENEwlMe,JAIIfiFS BARTON.SUPERWSOR:CORI CONDON THIS PROJECT WAS LIST MODIFIED BY I N ND a NON 5rYL201410:1E:18AM-HIBTORY TWO SITE HA9 SUBMITTALS.CLCK11EgE TO'PEI A NEW WINDOW NAT,THE SUBMITTAL APPROVAL PAGE FOR THIS SITE Path to Closure Plan THIS VERSION IS FINAL AS OFNa02014 PATH TO CLOSURE IarT [ cA IMPEDIMENT 1: General Criteria A:The unauthorized release Is NOT located within the service area of a public water f' procedural Impatllment-)gEg system Sb to Resolve lm imemt-Sts 1:- cur[ently this site la located within the County realm of influence and there are no projected plana for COMPLETION DATE a,mexation into the City of Stockton public water supply system. Currently public water supply as is ecce locatetl across the highway within approximately 500 feet. RP/consultant will have to snow site can be 12/1/201/ _Inas,.avd . a•.�• u_ 9A-1s.w._a.,..•..ni. a leinn�GuiA<11nne d-9n __—.__.__ . ADD ADDITIONAL STEP IMPEDIMENT 2: M dies if Criteria'Groundwater:The Contaminant plume that exceeds water quality objectives is ❑ Procedural Impediment-IOEO NOT stable or decreasing in areal extent,and does NOT meet all of the additional characteristics clone of the five classes of sites. Conditions that do not meet the policy criteria: • Plume Length(That Exceeds Water Quality Objectives):2100 Fast antl<260 Feet • Nearest Supply Well(From Plume Boundary):5 250 Feet to R.I.Inipscildent 2-Ste 1: DELETE STEP - cuaentl (10/9/2013) this site i n the COMPLETION OATS Y process of undergoing an eve silo[ Test to be scnetluled at a later date.RP has been contacted for status update as of 9/9/2013. Emil sent to consultant ARCADIS farPROJECTED R ACWAL PAIL status this date 9/9/2013. nate obtained Irom installation of SVE wells and the pilot test, if already 3.1(1014 y13201d 7 mNva[n,vi thmatmti£tca[lnn..1�_tba..eun a I- San-- �•e _.nn=:*+..—xwa-,in. PE W Resolve Iniparthnent 2.Sued 2:-01a FTV amea ^' e Review of SVE pilot test report shows that the SVE wells a n 59-69 feet beg, but ,mat impacted COMPLETION DATE oil generally Isom near surface grade to 25 feet beg, locally to40feet beg, yet pilo[ teat mese DATE r TUALD very ra[ea v re approx 69 lb/day and 109 16/day TPN1 appe[ing [o be a high recovery [ere for _ 12/3Q2014 I redo e e ecov _ eicYGne wnlln not c,�.cuauAinJaa-a'mnasfs, inn..rat wi 1l. r1.c o....... n -1_mehe=i_aai Pc ADD ADDITONAL STEP IMPEDIMENT 3: Media Specific Criteria:Petroleum Vapor Intrusion to Indoor Air:The site is NOT considered low-threat for f procedural Impetliment-lyrg the vapor-intruslon-to-air pathway and site-specific conditions do NOT satisfy hems 2a,2b,or 2c. Conditions that do not meet the policy criteria: • TPH in the Bioattenuation Zone:2100 mg/kg • Bioattenuation Zone Thickness:<5 Feet(No BioZone) • 02 Data in Bioattenuation Zone:No 02 Data • Soil Gas Benzene:Unknown • Soil Gas EthylBenzene:Unknown • Soil Gas Naphthalene:Unknown Slep to Resolve ftepedideent 3-Ste 1 ---- service [ t' PF/consultant COMPLETION DATE sit, no Israel, an active s nsultant moat tlemomtra[a an acceptable level of ��AA 00AA�� k 's no[ exceeded on the site for vapor intrusion or propose a corrective action to addr:sa no issue. ATE ACTU 1a3orzD14 A00. SWIP IMPEDIMENT 4: Media Specific Criteria:Direct Contact and Outdoor Air Exposure:The site Is NOT considered low-threat E- Procedural Impediment-0lEp for direct contact and outdoor air exposure as it does NOT meet 1,2,or 3. Conditions that do not meet the policy criteria: • Exposure Type:Utility Worker • Petroleum Constituents in Soil:5 5 Feet bgs • Soil Concentrations of Benzene:>14 mg/kg • Soil Concentrations of EthylBenzene:>89 mglkg and 5 134 mg/kg • Soil Concentrations of Naphthalene:Unknown • Soil Concentrations of PAH:Unknown • Area of Impacted Soil:Unknown snap to Resolve Impediment 4-Ste 1:- COMPLETION DAM RP/cons£l[oi.1. ..ue[ c to trate a acceptable level of risk i not exceeded onto on the site for direct n ac a contact and .o:F--'s'�=e to oI[tloo[ air or must propose a corrective action to address the 11, Esilff&JER ELAM ACTUAL QATE 121JN2014 ADD ADDITIONAL STEP https://geotracker.waterboards.ca.gov/regulators/screens/closure_policy.asp?global_id=T06... 5/8/2014